DOE/EIS-0332; McNary-John Day Transmission Line Project Draft ...

Table 2-3: Summary of Impacts and Mitigation Measures for the Proposed Action and No Action Alternative, p 2
Proposed Action No Action
Potential Impact Mitigation Measures Potential Impacts
Streams, Rivers, and Fish
� Potential transport of sediment to fishbearing
waters
� Potential accidental spills of
construction materials into waterways
� Potential dry wash crossing and culvert
installation
� Potential blasting near fish-bearing
waters
� Implementation of vegetation
management techniques
Vegetation
� Proposed project would temporarily
disturb 121 to 134 acres depending on
the number and location of conductor
tensioning sites
� Temporary impact to 24 to 27 acres of
native plants and 4 acres of
cryptogramic crusts; permanent impact
to 12 acres of native plants and 2 acres
of cryptogramic crusts
� Establishment of noxious weeds
� Vegetation loss due to fire
� Use erosion control methods during construction (see mitigation measures
for Geology, Soils, and Seismicity)
� Develop and implement a Spill Prevention and Contingency Plan
� Install water and sediment control at dry wash crossings and construct
culverts per WDFW guidelines
� Avoid blasting within 200 feet of streams when salmon eggs or alevins are
in gravels
� Follow BMPs defined in Vegetation Management Plan
� Locate transmission line as close as possible to existing lines to minimize
additional clearing
� Utilize existing access roads to reduce need for new access roads; limit
construction equipment to designated construction areas
� Avoid placing towers in riparian zones
� Keep vegetation clearing to a minimum
� Reseed areas temporarily disturbed in higher quality shrub-steppe with
native grasses and forbs
� Minimize disturbance to native species during construction to prevent
invasion by nonnative species
� Conduct pre- and post-construction noxious weed surveys; enter into active
noxious weed control programs
� Wash vehicles that have been in weed-infested areas
� Use certified weed-free mulch
� Equip all project vehicles with basic fire-fighting equipment, including
extinguishers, shovels, and other equipment deemed appropriate
� No impact
� No impact